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UPSTREAM: kcov: improve CONFIG_ARCH_HAS_KCOV help text

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(Upstream commit 40453c4f9bb6d166a56a102a8c51dd24b0801557.)

The help text for CONFIG_ARCH_HAS_KCOV is stale, and describes the
feature as being enabled only for x86_64, when it is now enabled for
several architectures, including arm, arm64, powerpc, and s390.

Let's remove that stale help text, and update it along the lines of hat
for ARCH_HAS_FORTIFY_SOURCE, better describing when an architecture
should select CONFIG_ARCH_HAS_KCOV.

Link: http://lkml.kernel.org/r/20190412102733.5154-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 147413187
Change-Id: If1a6cce383c704fc96ea9a267459b665d32fb8bd
This commit is contained in:
Mark Rutland 2019-04-18 17:50:37 -07:00 committed by Alistair Delva
parent 3a3cd9cd27
commit 9b5f12321a
1 changed files with 3 additions and 3 deletions
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6
lib/Kconfig.debug
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@ -736,9 +736,9 @@ endmenu # "Memory Debugging"
config ARCH_HAS_KCOV
bool
help
KCOV does not have any arch-specific code, but currently it is enabled
only for x86_64. KCOV requires testing on other archs, and most likely
disabling of instrumentation for some early boot code.
An architecture should select this when it can successfully
build and run with CONFIG_KCOV. This typically requires
disabling instrumentation for some early boot code.
# Upstream uses $(cc-option, -fsanitize-coverage=trace-pc), which requires
# cc-option support. Here we instead check CC in scripts/Makefile.kcov.